TIPD138 Reference Design

Texas Instruments

SPI programmable 16-bit: 36V: 1A Power Supply with Integrated Current Shunt


This Verified Design provides the theory: component selection: simulation: PCB design: and measurement details for a SPI controlled 36V power supply capable of sourcing 1A.  It also includes an intergrated high-side current shunt accurate to 1% across multiple decades of current load.  The output of the design is sourced by the DAC8871 which supports both unipolar and bipolar output ranges.  As a result: this circuit can be easily modified to meet the needs of many different applications. See more TI Precision Designs

  • 36V @ 1A Load SPI Controlled Output0.08% Measured FSR Gain Error8.2mV Measured Offset ErrorCurrent Monitor OutputVariable Decades of Current Measurement  This Verified Design Includes:TheoryComponent SelectionTINA-TI SimulationSchematics and PCB LayoutVerification and Measured PerformanceModification Options  
  • Digital multimeter (DMM)
  • Battery test
Product Categories
  • Data converters


Part Number Name Companion Part
DAC8871 DAC8871 Buy Datasheet
INA146 INA146 Buy Datasheet
LF411 LF411 Buy Datasheet
OPA140 OPA140 Buy Datasheet
OPA2277 OPA2277 Buy Datasheet
OPA549 OPA549 Buy Datasheet
REF102 REF102 Buy Datasheet

Bill Of Materials

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIPD138 BOM 11 Sep 2013 PDF 196
TIPD138 Schematic 11 Sep 2013 PDF 199
TIPD138 Gerber 10 Sep 2013 ZIP 2729